Development of Full-Dimension (FD) MIMO/elevation beamforming technology for evolution towards 5G and beyond wireless communication systems. This research bridged the gap between the 3GPP’s vision for FD-MIMO and the theoretical study of elevation beamforming by proposing efficient active antenna array designs, developing 3D channel models and characterizing spatial correlation functions to support and evaluate this technology. The proposed elevation beamforming schemes can significantly increase the number of served mobile broadband subscribers in 3D urban macro/micro scenarios while guaranteeing a significantly improved quality of service.